Publications
On Pseudovarieties of Forest Algebras. International Journal of Foundations of Computer Science.Edit
Power pseudovarieties of semigroups. I, II. Semigroup Forum. 1986;33:357-373, 375-390.Edit
Periodic points of a continuous map of the interval. Portugal. Math.. 1987;44:361-370.
Parallel projection of matroid spheres. Portugal. Math.. 1988;45:337-346.Edit
On pseudovarieties of monoids. In: Semigroups, theory and applications (Oberwolfach, 1986). Vol 1320. Springer, Berlin; 1988. 1. p. 11-17p. (Lecture Notes in Math.; vol 1320).Edit
On power varieties of semigroups. J. Algebra. 1989;120:1-17.Edit
On pseudovarieties, varieties of languages, filters of congruences, pseudoidentities and related topics. Algebra Universalis. 1990;27:333-350.Edit
On the power semigroup of a finite semigroup. Portugal. Math.. 1992;49:295-331.Edit
Performance of a QR algorithm implementation on a multicluster of transputers. Computing Systems in Engineering. 1995;6:363-367.Edit
Preconditioners for nonsymmetric linear systems in domain decomposition applied to a coupled discretization of Navier-Stokes equations. In: Palma JMLM, Dongarra J, editors. Vector and Parallel Processing –- VECPAR'96: Second International Conference on Vector and Parallel Processing –- Systems and Application Porto, Portugal, September 25–27, 1996 Selected Papers. Vol 1215. Springer Berlin Heidelberg; 1997. 2. p. 295-312p. (Lecture Notes in Computer Science; vol 1215).Edit
Prime links in some skew-polynomial and skew-Laurent rings. Comm. Algebra. 1997;25:1443-1469.
The pseudovariety $\bf J$ is hyperdecidable. RAIRO Inform. Théor. Appl.. 1997;31:457-482.Edit
Preconditioned iterative methods for coupled discretizations of fluid flow problems. IMA Journal of Numerical Analysis. 1998;18:385-397.
On a problem of Brzozowski and Fich. In: Semigroups and applications (St. Andrews, 1997). World Sci. Publ., River Edge, NJ; 1998. 1. p. 1-17p. Edit
Profinite categories and semidirect products. J. Pure Appl. Algebra. 1998;123:1-50.Edit
Parallelization of an implicit algorithm for fluid flow problems. In: Topping B.HV, editor. Parallel and Distributed Processing for Computational Mechanics: Systems and Tools. Saxe-Coburg Publications, Stirlingshire, UK; 1999. 3. p. 300-314p. Edit
On Parseval equalities and boundedness properties for Kontorovich-Lebedev type operators. Novi Sad J. Math.. 1999;29:185-205.Edit
Power exponents of aperiodic pseudovarieties. Semigroup Forum. 1999;59:18-32.Edit
Presentations for subsemigroups of finitely generated commutative semigroups. Israel J. Math.. 1999;113:269-283.Edit
On presentations of commutative monoids. Internat. J. Algebra Comput.. 1999;9:539-553.Edit
On presentations of semigroup rings. Boll. Unione Mat. Ital. Sez. B Artic. Ric. Mat. (8). 1999;2:127-142.Edit
Pseudovariety joins involving $\scr J$-trivial semigroups. Internat. J. Algebra Comput.. 1999;9:99-112.Edit
Partially hyperbolic and transitive dynamics generated by heteroclinic cycles. Ergodic Theory Dynam. Systems. 2001;21:25-76.Edit
Path Formulation for a Modal Family. Portugaliae Mathematica. 2001;58(4):407-424.
The pseudoidentity problem and reducibility for completely regular semigroups. Bull. Austral. Math. Soc.. 2001;63:407-433.Edit